Gotze, 18, has been a regular in the Dortmund side which has run away with the
Bundesliga this season - Jurgen Klopp's men are seven points clear with six
games remaining - and also made his Germany debut in November.

Speculation has suggested Europe's leading clubs have him in their sights but
Watzke is adamant the midfielder is going nowhere.

''I can say he is not for sale,'' he told the Bild newspaper, before insisting
the club would reject a €25 million offer for a player who came through
their system.

''Definitely. Mario has a contract with us until 2014 and he will remain in
Dortmund for at least that period of time. Other clubs can forget making an offer for Mario, they would be wasting their time.''

The 4-1 weekend win over Hannover has left Dortmund 14 points clear of
third-placed Bayern Munich with the top two qualifying automatically for next
season's Champions League. And while Watzke is confident his club will be competing among Europe's best in 2011-12, he was more cautious when it came to discussing the title.

He added: ''We can assume that the points we took against Hannover mean we will
qualify for the Champions League but the title... we have six tough games
left.''